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  <title>Fetch a stored variable from the cache</title>
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 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.apcu-fetch" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">apcu_fetch</h1>
  <p class="verinfo">(PECL apcu &gt;= 4.0.0)</p><p class="refpurpose"><span class="refname">apcu_fetch</span> &mdash; <span class="dc-title">
   Fetch a stored variable from the cache
  </span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.apcu-fetch-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>apcu_fetch</strong></span>
    ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$key</code></span>
   [, <span class="methodparam"><span class="type">bool</span> <code class="parameter reference">&$success</code></span>
  ] ) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>

  <p class="para rdfs-comment">
   Fetchs an entry from the cache.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.apcu-fetch-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">key</code></dt>

     <dd>

      <p class="para">
       The <code class="parameter">key</code> used to store the value (with
       <span class="function"><a href="apcu_store.html" class="function">apcu_store()</a></span>). If an array is passed then each
       element is fetched and returned.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">success</code></dt>

     <dd>

      <p class="para">
       Set to <strong><code>TRUE</code></strong> in success and <strong><code>FALSE</code></strong> in failure.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.apcu-fetch-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   The stored variable or array of variables on success; <strong><code>FALSE</code></strong> on failure
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.apcu-fetch-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-421">
    <p><strong>Example #1 A <span class="function"><strong>apcu_fetch()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$bar&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">'BAR'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">apcu_store</span><span style="color: #007700">(</span><span style="color: #DD0000">'foo'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$bar</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">apcu_fetch</span><span style="color: #007700">(</span><span style="color: #DD0000">'foo'</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
string(3) &quot;BAR&quot;
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.apcu-fetch-changelog">
  <h3 class="title">更新日志</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>版本</th>
      <th>说明</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>3.0.17</td>
      <td>
       The <code class="parameter">success</code> parameter was added.
      </td>
     </tr>

    </tbody>
   
  </table>

 </div>


 <div class="refsect1 seealso" id="refsect1-function.apcu-fetch-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="apcu_store.html" class="function" rel="rdfs-seeAlso">apcu_store()</a> - Cache a variable in the data store</span></li>
    <li class="member"><span class="function"><a href="apcu_delete.html" class="function" rel="rdfs-seeAlso">apcu_delete()</a> - Removes a stored variable from the cache</span></li>
    <li class="member"><a href="class.apcuiterator.html" class="classname">APCUIterator</a></li>
   </ul>
  </p>
 </div>


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